Thoughts on these amp measurements

[SoundSoundS]

Hi All,
i'm looking onto an integrated amp measurements (on paper) and owuld appreciate any toughts on these. In particular the THD+N/SNR/THD. Does the THD+N look a bit low to be concidered reasonably good at 100W?

Output power:	2 x 167 W into 8 Ω 2 x 284 W into 4 Ω
Frequency response:	0.3 – 650,000 Hz (-3 dB)
Damping factor:	typ. 1,000 at 100 Hz
Harmonic distortion:	k2 typ. -101 dB, k3 typ. -107 dB, @1 kHz, 25 W / 4 Ω
THD + N:	< -98 dB @1 kHz, 100 W / 4 Ω
SNR:	> 106 dB (A-weighted)
Channel separation:	> 103 dB @ 1 kHz

 

[DVDdoug]

Does the THD+N look a bit low to be concidered reasonably good at 100W?

Lower (a bigger negative number) is better.

It looks good to me! You can't always trust or compare measurements unless they are done consistently and independently (like Amir's measurements here at ASR). I believe Amir measures SINAD relative to 5W so a higher power amp doesn't automatically give a better number.

And I don't fully-trust the manufacturer's published specs...

But it it's -98dB at 100W the noise will be -88dB at 10W and depending on the sensitivity of your speakers, how close you are to the speakers, and the background noise in the room, you probably won't hear the amplifier noise.

 

[HarmonicTHD]

Yes there are even better measuring amps, but these measurements are perfectly fine.

 

[SoundSoundS]

Lower (a bigger negative number) is better.

It looks good to me! You can't always trust or compare measurements unless they are done consistently and independently (like Amir's measurements here at ASR). I believe Amir measures SINAD relative to 5W so a higher power amp doesn't automatically give a better number.

And I don't fully-trust the manufacturer's published specs...

But it it's -98dB at 100W the noise will be -88dB at 10W and depending on the sensitivity of your speakers, how close you are to the speakers, and the background noise in the room, you probably won't hear the amplifier noise.

Thanks! Yeah, i have a general understanding of measurements and how speakers affect them and such , but sometimes when wendors choose to point out diffrent measurements in diffrent ohms @ different Watts , it throws me off And sometimes i can't really do all the math

 

[Speedskater]

Frequency response: 0.3 – 650,000 Hz (-3 dB)
That's way higher than it needs to be.

 

[SoundSoundS]

Frequency response: 0.3 – 650,000 Hz (-3 dB)
That's way higher than it needs to be.

It's one of those measurements that a lot of the high end amps go overboard with for i guess marketing purpouses

 

[fpitas]

It's one of those measurements that a lot of the high end amps go overboard with for i guess marketing purpouses

Perhaps; but it's a bad idea to respond that high, since you simply encourage pickup of things like AM radio frequencies.

 

[Calleberg]

Hmm, I wonder WATT it could be.

 

[SoundSoundS]

Hmm, I wonder WATT it could be.

Who the Watt knows!

 

[HarmonicTHD]

But hey. The suspense is killing us. What amp is it ? ;-)

 

[SoundSoundS]

But hey. The suspense is killing us. What amp is it ? ;-)

Audionet Watt. I didn't directly ask for a opinion on the amp as i know it's not very popular in this group

 

[fpitas]

Audionet Watt. I didn't directly ask for a opinion on the amp as i know it's not very popular in this group

Other than the silly high frequency response (which can be fixed easily with an input LPF) it looks good to me.

 

[Mnyb]

One thing that stands out in the spec is that THD is measured at only 25w and only second and third harmonic summed ? What about that ?

They should have speced to some standard ( any standard) it’s not really possible to compare with anything?
Send it to Amir ?

 

[HarmonicTHD]

Audionet Watt. I didn't directly ask for a opinion on the amp as i know it's not very popular in this group

According to this. The amp doesn’t seem to quite meet the published specs. Still okish. But for 12500 bucks? Or is this a different amp?

Audionet Watt: Labor Seite 5 - i-fidelity.net

Mit dem Watt ist der zweite Hauptdarsteller der Scientist-Serie bei i-fidelity.net zu Gast. Audionet will mit diesem Vollverstärker ein Zeichen setzen, das über seine Klasse hinaus Signalwirkung hat.

www.i-fidelity.net

 

[SoundSoundS]

One thing that stands out in the spec is that THD is measured at only 25w and only second and third harmonic summed ? What about that ?

They should have speced to some standard ( any standard) it’s not really possible to compare with anything?
Send it to Amir ?

I'ts 55 pounds / 25 kg's . A bit difficult to move between rooms to begin with

 

[Mnyb]

According to this. The amp doesn’t seem to quire meet the published specs. Still okish. But for 12500 bucks? Or is this a different amp?

Audionet Watt: Labor Seite 5 - i-fidelity.net

Mit dem Watt ist der zweite Hauptdarsteller der Scientist-Serie bei i-fidelity.net zu Gast. Audionet will mit diesem Vollverstärker ein Zeichen setzen, das über seine Klasse hinaus Signalwirkung hat.

www.i-fidelity.net

Besides price it’s low(ish) distortion and low output impedance, so it will very likely be fine for most use cases ?
That would answer OP yes it’s “ok” and will perform and not cause issues ?

The measurements showed a rather low S/N ratio ? That would be the only worry. But if you try the amp and are not bothered by noise in listening position it not the end of the world either ?
Is this a penalty for the extreme bandwidth ?

 

[HarmonicTHD]

Besides price it’s low(ish) distortion and low output impedance, so it will very likely be fine for most use cases ?
That would answer OP yes it’s “ok” and will perform and not cause issues ?

The measurements showed a rather low S/N ratio ? That would be the only worry. But if you try the amp and are not bothered by noise in listening position it not the end of the world either ?
Is this a penalty for the extreme bandwidth ?

Yes that’s how I would see it too.